The first seizure was at 7:30 a.m., when a drug-sniffing federal canine discovered 109 kilos of cocaine worth $2.1 million stashed inside one of the four spare tires on board an Atlas Air cargo 747 jet, said Zach Mann, spokesman for U.S. Customs.

It was almost a year ago when Customs discovered 107 kilos in a spare tire on a different jet at the same airport, and almost two years to the day when Hong Kong officials discovered the drugs in one of their spare tires. All of the flights originated in Colombia, Mann said.

"It looks like the same organization," he said.

The second seizure Sunday happened at about 9 a.m. when officials discovered 23 kilos of cocaine worth $430,000 hidden in a shipment of assorted flowers aboard a Tampa Airlines cargo jet.

There were no arrests Sunday. From Nov. 1 through Dec. 1, about 20 people have been arrested for smuggling drugs through Miami International Airport.